The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
Free tracker included with every download this week
What Is 83 Kilos in Stone and What's Your BMI?
83 kilos converts to 13 stone and 1 pound in UK measurements. However, your BMI at this weight depends entirely on your height. A taller person will have a lower BMI than a shorter person at the same weight, which is why the NHS uses BMI alongside other health measurements. Use our free BMI calculator above to instantly work out your personal BMI, or read on to see how 83kg translates across different heights and what the NHS categories mean for your health.
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Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
What Is Your BMI at 83kg? Height-by-Height Breakdown
To convert 83kg to stone, divide by 6.35: 83kg = 13 stone and 1 pound. Your BMI at this weight varies significantly based on height. Here are five examples using the BMI formula (weight in kg ÷ height in metres squared):
- At 160cm (5ft 3in): BMI = 32.2 — Obese (Class I) category
- At 165cm (5ft 5in): BMI = 30.5 — Obese (Class I) category
- At 170cm (5ft 7in): BMI = 28.7 — Overweight category
- At 175cm (5ft 9in): BMI = 27.1 — Overweight category
- At 180cm (5ft 11in): BMI = 25.6 — Overweight category
These examples show why height matters: someone who is 180cm (5ft 11in) at 83kg sits in the overweight range, while someone 160cm (5ft 3in) at the same weight falls into the obese category. Calculate your exact BMI using the free calculator on this page.
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No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS BMI Categories and What They Mean
The NHS categorises adult BMI into five ranges: Healthy weight (18.5–24.9), Overweight (25–29.9), Obese Class I (30–34.9), Obese Class II (35–39.9), and Severely Obese (40+). At 83kg, your category depends on your height as shown above. It's important to remember that BMI is a screening tool, not a perfect measure. It doesn't account for muscle mass (muscle weighs more than fat), where fat is stored on your body, or your overall fitness level. Your GP can provide personalised advice about what your BMI means for your individual health risks.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
How do I convert 83 kilos to stone and pounds?
Divide 83 by 6.35 to get stone: 83 ÷ 6.35 = 13.07 stone. This equals 13 stone and 1 pound. To convert kilograms to stone, use this standard kg to stone conversion formula for any weight.
Is 83kg overweight for all heights?
No. At 83kg, your weight category depends on your height. Taller individuals will have a lower BMI and may fall into the overweight range, while shorter individuals may be in the obese category. Use our BMI calculator above to find your personal category.
What does BMI actually tell me?
BMI is a useful screening tool that indicates whether your weight falls within a healthy range for your height. However, it doesn't distinguish between muscle and fat, doesn't account for where fat is stored, and may not be accurate for athletes, elderly people, or those with high muscle mass.
Should I aim to lose weight at 83kg?
That depends on your height and overall health. If your BMI is 25 or above, the NHS suggests considering weight loss. However, even a modest 5–10% reduction in body weight can bring meaningful health benefits. Speak with your GP for personalised advice based on your individual health profile.
How can I track weight loss from 83kg?
Use our free progress tracker on this page to log your weight over time and monitor your journey. Track alongside lifestyle changes like increased physical activity and dietary adjustments. Regular monitoring helps maintain motivation and identify what works best for you.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.